Pump jack



March 3, 1931 A CLACSQN 1,794,443

PUMP JACK Filed June 30, 1928 Patented Mar. 3, 1931 Ura veurem* 'oFFic-E namens` oLAosoN, on Lewis RUN, PENNSYLVANIA PUMP JACK Application ledJune 30,

` lt is the object of this invention to provide a novel and improvedv pump jack of cheap and simple construction which may be used for raising and lowering the pump Vplunger V8 rod of an ordinary water pump in a true scribed in the following specification, made in connection with the accompanying drawings, wherein like reference characters refer I to the same, or similar parts throughout the various views and, in which,`

Fig. 1 is a view in side elevation of the pump jack applied to an ordinary water pump;

Fig. 2 is a plan view of the pump jack;

Fig. 8 is a vertical section through the ypump jack taken substantiallyvon the line 3-3 of Fig. 1, as is indicated bythe arrows; Fig. 4; is a vertical section taken. on the `line 1 4 ofy Fig. 1, as is indicated by the arrows, and

Fig. 5 is a horizontal section taken on the line 5-5 of Fig. l, as is indicated by the arrows. 1

Referring to the drawings, a water pump A kof typical standard construction is illustrated and is shown as being mounted on a platform B. Thepump plunger rod is designated by the numeral 6 and the handle of the pump is designated by .thefnumeral 7. A. base 8 yis mounted on the platform B at one side of the pump A and a suitable power mechanism 9, such as an electric motor, or gasoline engine, is illustrated as being secured to the base adjacent its end farthest away from the pump, hereinafter designated the rear end. The power unit 9 carries a rotatable disk 10 anda link 11 is pivotally secured to the disk 10 in an eccentric position relative'to the center of rotation of the disk.

In accordance with the present invention, a suitable upstanding standard 12 is provided, and this standard is illustrated as being composed from the two bars 12a having their lower endsspaced a considerable 'distance apart, and provided with horizontal bends 192s. serial, No. 289,389.

which rest on abearing block 13 mounted on the base 8 and extending between the lower endsA of the bars 12a. The bearing block 13 and .the lower ends of the bars 12a may-be suitably bolted or otherwise secured to the base 8.1 The bars 12a project diagonally upwardly and toward each other from their y lower ends, abut shoulders 'on the lbearing blocks 13 and are bent:` adjacent their upper ends, so that they extend in parallel closely spaced relationship. A camway 14 extends between the upper parallel portions of the bars 126iy of the standard and projects forwardly therefrom. The' camway is provid- Ved with-two spaced hubs adjacent its rear end and nuttedbolts 15 extend through the hubs of the camway and the upper ends of the two, bars 12a, to secure the camway'to the standard 12 andat the same time to secure the upper ends of the bars 12a rtogether inparallel spaced relationship. rEhe upper 'hub ofthe camway preferably Vextends throughout the whole distance between Ythe upper ends of the two bars 12a to space the two bars, and the lower hub is of short length and occupies merely the central space on the` lower bolt lvbetween the two bars 12a. The

slot in the camway is substantially arcuatey and is concave relative to the plunger rod 6 ofthe pump. An arm 16 formed from two bars 16a held in parallel spaced relationship by a spacing block 167) at their rear ends, and secured to the block and having a plurality of spaced holes adjacent their forward ends, is pivotally secured at its forwardend to the plunger rod 6 of the pump by means of the nutted bolt 18. The two bars16afl are bent slightly toward each other at their forward ends, and one of the bars extend at either side of the plunger rod 6. The mainportion of the camway 1A extends between the two bars 16a of the arm 16 adjacent its rear end, while the rear portion of the camway extends between the two bars 12a of the standard v12 and between the two bolts l5. The bars 16a extend one at either side of the lower hub of the camway 14,

mountedv on the lower bolt 15. vThe upper crank lever 23 also formed from two bars.`

The bell crank lever is pivotally mounted on a short shaft 211 which is journaledr inthe bearing block 13. A colla-r is secured to the shaft 2a intermediate the two bars forining the bell crank lever 23, and washers are interposed between the inner sides of the bars i. L i 11 Y J. of Athe ben crank lever and the collar 25.

' Inner shoulders on the bearing blocks 13 abut 'materia-ll having a U-shaped portion Vthe lower ends of the two bars.

the outer sides of the bars forming the bell crank lever and it willv thus be seen that the bars forming the bell crank lever willvbe held in spaced pelationship and that the shaft 24 lcannot slide longitudinally. lf desired, small spacing collars may be interposed about the pivot 21 inwardly from the bars 16a. As illustrated in Fig. 5A the two bars forining link 22 are formed from one piece of joining The U- shaped portion of the link vwill brace and holdthe bars forming the bell crank lever V23 in spaced arrangement at their ends pivoted to the link 22. The link 11 is provided with aseries of spaced holes Vat its forward end and the other arm of-the bell crank lever Q3 will be pivotally secured to the link 11 through one of these holes.

Y In operation, the bell crank lever may be oscillated by means of `the link 11 which is eccentrically mounted on the disk 10 and will move backwardly and forwardly as the disk 10 is rotated. Motion will be imparted from the bell crank lever 23 to the link 22 which will first act to raise the forward end of arm 16 and then to lower the same. VAs

the arm 16 is raised, it will` swing about the lower bolt 15 as a fulcrum point, and the cam slot in the cainway 14 will so guide the cam roller 19 mounted on the arm 16, that the forward end of the arm will be capable of movement in only a vertical plane. As the arm is raised, therefore it will slide first rearwardly and then forwardly respective to the lower bolt 15. Upon the downward movement of the link 22, the forward end of the arm 16 will be carried downwardly, thereby causing the rear portion of the arm to strikel the upper hub of the camway 14: causing theupper hub to act as a fulcruin. The slot in the can'iway 1e will act to restrict the downward movement of the forward end of the arm 16 to movement in only a verti- .cal plane, and the arm will be free toslide forwardly and rearwardly respective to the upper bolt15, and the upper hub of the camscope way 1e. As the forward end of the arm 16 is moved upwardly and downwardly, the plunger rod of the pump will be actuated to operate the pump. A straight upward and downward movement of the plunger rod will occur.

The device is cheap and simple in construction, can be readily installed on practically any type of pump and will be found to be moet efficientin action.

1t will, of course, be understood that various changes may be, made in the form, de-

` arrangement and proportions of the l of the present invention.

ll-.That is claimed is:

1. A pump jack or the like'having in coinb-ination a pair of upstanding spaced bars forming a standard, tically spaced fulcrum members mounted in and extending between said spaced bars, an arm having a forward end adapted to be pivotally secured to a pump plunger rod or a pair of horizontal verthe like and ha vving a free rear end projectj,

ing through the opening between said spaced bars and said fulcrum members for sliding movement, a 'can'iway secured to said stand- I ard, mea-ns mounted on said arm and working within ing the forward end of said arm upwardly and downwardly, saidcamway acting with said standard and fulcruin members to restrict tlie forward end of said arm tornovement in a vertical line.

2. 'A pump jack or the like comprising a standardincluding two bars placed in spaced arrangement adjacent their upper ends, a pair of vertically spaced horizontal bolts connecting said two bars adjacent their upper ends, a camway having a` forward portion of narrower width than the spacing between the upper Vends of said bars and having a first rear hub of the same width as the spacing between the upper ends of said bars and, lit ling on one of said bolts between the bars,

said camway having a. second rear hub of less width than the spacing between the upper ends of said bars 'and centrally mounted between said bars on the other of said bolts,l

-ined to movement in a true verticalline.

ln testimony whereof l affix my signature.

ANDERS CLACSON.

said cainway, and means for niov V 

